Development of a Novel Finger-Trigger Interface for Trigger Pull Measurement

Trigger pull is the force that needs to be exerted on the trigger to discharge a firearm. The measurement of trigger pull can assist in the evaluation of the safety, function, and manufacturing characteristics associated with a firearm during the forensic firearm examination process. Nonetheless, the accuracy and uncertainty of trigger pull measurements may be affected by the measuring device, test procedure, and environmental conditions. In this work, an innovative finger-trigger interface device was developed to facilitate accurate trigger pull measurements. The idea was to reduce the variation related to the position of the measurement device on the trigger in existing measuring methods and devices. Three force sensors based on different technologies were initially evaluated. While two of the three sensors failed to produce data, the miniature capacitive plate sensor exhibited high precision and a linear response over the range of typical trigger pulls. To examine the effects of the finger-trigger interface on trigger pull measurement, different sensor housing prototypes were designed in silico and 3D printed for the construction of three finger-trigger interface devices. The performance of each finger-trigger interface device was evaluated by measuring the trigger pulls of several selected firearms and comparing the data to a previously published study. Our preliminary results demonstrated the novel finger-trigger interface device offered a new way to measure trigger pull in situ with acceptable accuracy and precision.     

Civilian Forensic Technician and Sworn Police Officer Job-Related Stress

Forensic Technicians provide crime scene investigation services and are exposed to stressful violent crimes, motor vehicle accidents, biological or chemical hazards, and other appalling imagery. Forensic Technicians would likely experience physical and psychological stress after exposure to trauma, and security vulnerabilities similar to Sworn Police Officers. The perceived availability of mental health resources, job-related physical, psychological stress, and traumatic experiences of both Forensic Technicians and Sworn Police Officers from California law enforcement agencies were investigated using a self-reported survey. Responses were evaluated for any significant differences in the perceived stress, job-related physical stress, and resulting psychological impact affecting the participants. The survey contained a mix of True/False, Circle/Check the Appropriate Box, or Likert Scale (1–5) responses. The results were evaluated statistically and discussed. Results indicated Sworn Police Officers and Forensic Technicians have different on-duty stress levels, but similar off-duty stress levels. Nearly two-thirds of 54 job-related stressors were not significantly different between the two occupations. However, Forensic Technicians reported more adverse effects in 17 physical and psychological job-related activities compared with Sworn Police Officers. Forensic Technicians reported lower awareness levels and availability of agency mental health support services than were reported by Sworn Police Officers. This study reports for the first time an unexpected outcome that perceived and job-related psychological stress is greater for Forensic Technicians than Sworn Police Officers. Possible reasons for this disparity will be discussed as well as stress management tools that should be implemented to reduce health risk factors for both career professionals as well as increase public safety.     

Diffusion models over the life cycle of an innovation: A bottom-up and top-down synthesis approach

The diffusion models tend to be tested individually in isolation and remain the same over time for the studied innovations in the literature. Moreover, there is growing interest to learn from other countries in our current age of globalization. Therefore, this paper chooses the innovation of public resources trading platforms in China to fulfill above literature gaps. We have examined key events and the issuances of related laws and regulations by Chinese governments. Our contributions are twofold: (a) Our analysis and results show that the diffusion models evolve over the different stages of a life cycle of an innovation, contrasting to the literature results that diffusion models remain the same for their studied innovations. Due to major diverse characteristics among different adopter categories over a life cycle of an innovation, we argue that it is appropriate and necessary to apply different diffusion models on different adopter categories, which is missing in the current literature. (b) We find a first bottom-up and then top-down synthesis approach as an effective, efficient diffusion process for both fitting local needs (i.e., effective) and adopting innovations rapidly nationwide (i.e., efficient).     

银发浪潮下的中国老年人力资源开发

人口老龄化是中国当前及今后很长时期都必须面临的重要问题,充分认识到老年人力资源开发的重要意义,挖掘老年人口红利将成为经济社会发展的新动力。中国拥有规模庞大的老年人力资源,但老年人口实际就业率并不高。影响老年人力资源开发和利用的因素既有社会观念、强制的退休年龄制度等宏观因素,也有老年人的就业意愿、健康状况、受教育程度等微观因素。促进老年人就业,实现老有所为是中国积极应对人口老龄化的重要举措。研究提出如下政策建议:转变社会观念,营造老年人力资源价值观念;重点开发低龄健康老年人力资源;加强对老年人的教育和培训;重视对老年就业的法律保护;改革现有的强制退休年龄制度,实行弹性退休制度。     

Why do street-level bureaucrats risk themselves for others? The case of Israeli police officers

What factors influence police officers’ willingness to risk themselves for others? Police officers are street-level bureaucrats, who are not only given the mandate to use deadly force in order to keep public order but also risk their most important resource – their lives – to protect society. We suggest three factors that prompt police officers to risk their lives: individual characteristics (a desire to gain respect and recognition, and testing one's courage, ideology, and personality), organizational conditions (expectations of peers and supervisors, promotion opportunities), and environmental context (a hostile working environment and the importance of public opinion to them). Using an abductive approach combined with a triangulated qualitative method, our findings indicate that personal characteristics are indeed important, but so too are organizational conditions and environmental context. The practical insight, therefore, is that decision makers ‘can’, in various formal and informal ways, influence street-level bureaucrats’ behaviour. Here, the interactions among managers, workers, and clients are a crucial element.     

Sharp Force Homicide in Denmark 1992–2016

Sharp force trauma is a common homicide method. The weapon is typically a knife, which is easily accessible and does not require special skills. We have analyzed all 471 sharp force homicides in Denmark during 1992–2016 with special focus on aspects that are relevant to forensic pathologists, including the distribution of wounds and organ injuries. Most homicides were committed inside with a kitchen knife. The front left thorax was the most common area to be affected by sharp force trauma. In 18.9% of the victims, there was only one sharp injury, the majority on the thorax. The most common trajectory for stab wounds was directly posterior with no deviation to the sides or up/down followed by directly anterior. The heart (including pericardium) and lungs (including hemo- and pneumothorax) had injuries in more than 75% of the victims. 67% of victims were males. Female victims had more sharp force injuries and defense wounds than male victims. Most females were killed in domestic homicides (73.7%), most commonly in partner killings (56.4%). In contrast, many male victims were killed in a setting of nightlife/intoxication (34.0%) most by a friend/acquaintance delivering a few stab wounds. The results clearly show strong sex differences in both victims and offenders. This could be useful for shaping policies and public opinion, and as a route for understanding the developments in interpersonal violence. In the narrow setting of death investigation, our results will provide an evidence-based approach to understanding the injury patterns in sharp force homicide.     

Procedural justice,obligation to obey,and cooperation with police in a sample of Jamaican citizens

ABSTRACT

Procedural justice theory plays a central role in understanding police–citizen relationships. To test the universality of procedural justice theory, researchers have tended to assess the relative impacts of normative and instrumental models of policing in different geopolitical contexts. Building on Reisig and Lloyd’s study in Jamaica, we test in the current study the relative impacts of procedural justice (a normative factor) and police effectiveness and risk of sanctioning (instrumental factors) on Jamaicans’ obligation to obey the police and willingness to cooperate with police. We found that procedural justice predicted both obligation to obey and cooperation, although obligation did not predict cooperation. And while effectiveness predicted obligation, it was not significantly related to cooperation. Lastly, older citizens were more willing to cooperate with police. The study’s implications for policy and future research are discussed.     

基于利益相关者理论构建专业教学资源库的应用驱动机制 ——以职业教育法律文秘专业教学资源建设为例

职业教育专业教学资源库建设项目是我国职业教育主动应对科技发展带来挑战的重要举措,对其“能学辅教”功能实现的程度直接反映了项目建设的水平,也反映了院校教育教学信息化改革的程度和热情。基于目前在应用方面存在的问题,本文拟利用利益相关者理论对项目应用主体进行分析,并结合法律文秘专业教学资源库建设情况实证分析,提出包括构建包括政策引导等内容的资源库应用驱动机制。     

图书馆文化与素质教育

素质教育是通过科学的教育途径,充分发挥人的天赋条件,提高人的各种素质水平,并使其全面、充分、和谐发展的教育。图书馆通过确定人文教育观念,树立人文精神,充分利用馆藏资源,激发读者独立思考和创新能力,以达到提高职工思想政治素质和科学文化素质的目的。     

Climate Change Policy Implementation: A Cross-Sectional Analysis

Why would countries invest resources to protect the global atmosphere, a global common‐pool resource? After all, this is an open‐access resource with no restrictions on appropriating its benefits. Furthermore, why would they do so under the aegis of a weak global regime (the United Nations Framework Convention on Climate Change, UNFCCC) that has virtually no provisions for sanctioning noncompliance and when the largest contributor to the problem is not participating in the regime? This article examines why a number of countries have implemented the UNFCCC. I hypothesize that countries implement UNFCCC because they corner domestic environmental benefits, namely reduction in local pollution. In my empirical analysis of 127 countries, employing an ordinal logistic regression model, I find that local air pollution is associated with higher levels of implementation of the UNFCCC. Thus, I conclude that the incentives to implement a relatively weak global regime can be found in the domestic political economy.